Common blue - Polyommatus icarus

Male upperside.  

Family: Lycaenidae

Flight Time: May-September

Size: 28-36mm

Altitude: 0-2700m

A very widespread species. The male pictured above has blue topsides where as the female to the right has a variable amount of brown on the topside. These pictures are very detailed and may be like those you see in science books when you rent textbooks for your Biology class. Chances are you may learn about butterflies in that class, too.

Most blues can quickly be differentiated by look at the underside forewing which has a spot in cell on the common blue.

Female underside. Female upperside


Fact File

Similar Species Foodplants Habitat Distribution

Polyommatus eros

Medicago, Lotus and others


Change map to  


Early Stages




© All pictures in these pages copyright to Simon Coombes. Permission must be sought and obtained for any use.